CWE fluid chillers provide up to 40 tons of cooling capacity in rugged, air-cooled unit. In the optional heat pump version, HWE, the unit can be switched between heating and cooling, with heating capacities up to 375,000 Btu/h. Standard features of CWE and HWE units include a non-ferrous fluid circuit, variable speed fans, and construction that is suitable for outdoor installation. CWE and HWE models are highly configurable with a wide range of tank and pump options. A hot gas bypass valve is also an option on CWE chillers for processes requiring tight temperature control. All models operate on 460/3/60 power and can be equipped with an optional remote control panel.

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CWE-HWE
CWE-HWE

FLUID CIRCUIT

  • Standard insulated plastic tank (unpressurized)
  • Optional pressurized tank
  • Tank includes fill port, drain valve, and level sensor
  • Insulated, non-ferrous centrifugal pump and fluid circuit
  • Adjustable fluid bypass (optional) protects pump from damage if chiller inlet and outlet are closed
  • Fluid differential pressure switch protects against low-flow condition
  • Fluid pressure gauge (pump discharge)
  • Ability to use glycol mixtures up to 50%

REFRIGERATION CIRCUIT

  • Manufactured with high-quality materials following rigorous brazing procedures and conforming to international standards (PED 97/23/EC)
  • Environmentally friendly R410A refrigerant
  • Refrigerant sight glass with moisture indicator and filter-dryer
  • Externally equalized thermostatic expansion valve
  • High and low pressure switches
  • High and low pressure gauges
  • High and low pressure access fittings for maintenance and troubleshooting
  • Optional Hot Gas Bypass Valve for highly accurate control of outlet fluid temperature

COMPRESSOR

  • Hermetic scroll compressors chosen for reliability and efficiency
  • Mounted on rubber isolators for noise reduction
  • Scroll compressors are especially quiet and can handle liquid return without damage
  • Protected against reverse rotation by an electronic phase monitor
  • Multi-compressor units include discharge check valves
  • Crankcase heater prevents liquid slugging on start-up

EVAPORATOR

  • Stainless steel, brazed plate evaporators are compact and highly efficient
  • Evaporators are protected against freezing by the microprocessor controller

CONDENSER

  • Manufactured from plated copper tubes and aluminum fins
  • Cleanable, stainless steel air filter
  • Variable-speed fan allows operation over a wide ambient temperature range

ELECTRICAL PANEL

  • Manufactured in compliance with international standards
    (EN 60204) using UL-recognized components
  • Electrical cabinet constructed of powder-coated galvanized steel
  • Disconnect switch with door lock prevents access to panel when
    energized

MICROPROCESSOR CONTROLLER (QBE003-025)

  • Optimizes unit performance and maintains fluid temperature
  • Controls and displays the fluid temperature
  • Turns the compressor(s) on and off while protecting against
    short cycling
  • Turns the pump(s) on and off; equalizes pump operating times
    (double pump models)
  • Regulates condenser fan speed
  • Protected by a watertight cover
  • Displays key operating parameters and the following
    alarm conditions:

    • High and low refrigerant pressure
    • High refrigerant discharge temperature
    • Low fluid differential pressure
    • Low fluid level
    • Incorrect phase sequence
    • Compressor, pump, or fan motor protector tripped
    • Temperature probe or pressure sensor failure
    • High fluid temperature
    • Evaporator anti-freeze
  • Optional remote control panel

UNIT CONSTRUCTION AND MAINTENANCE

  • Cabinet frame and panels are powder-coated and suitable for outdoor installation
  • Panels are easily removed, providing convenient access for maintenance and repair
  • All fasteners are stainless or zinc-plated steel for corrosion resistance
  • Protection to IP54 standard on all models; suitable for outdoor installation
  • Wheel kits are available for all models
  • Designed for ease of operation and maintenance

FACTORY TESTING OF EVERY CWE/HWE UNIT

  • Pressurization and helium leak detection of refrigeration circuit
  • Pressurization and leak testing of fluid circuit
  • Chiller/Heat pump performance and power consumption at full load
  • Proper operation of all controls, safety devices, and alarms
  • Electrical tests according to international standards (EN 60204)